Symptom

On C9500-40X when switch mode trunk and trunk allowed vlan be configured in interface , the Port LED will be amber.it is not happened on switch mode access.No communication impact.not see issue happend on C9500H.

Conditions

both command of switch mode trunk and trunk allowed vlan be configured in interface.only one command config ,issue not happend.

Workaround

shutdown / no shutdown interface

Further Problem Description